Engine-cooling system



Dec. 13, 1927. 1,652,736

P. J. SCHWALBENBERG ENGINE COOLING SYSTEM Filed May 19, 1916 vwewfo'a @3 1 @Homacq 2 Patented Dec. 13, 1927.

PETER J. S-CHWALBENBERG, on NEW YORK, .N'. Y.

EN GINE-COOLIN G SYSTEM.

Application filed May 19, 1916. Serial No. 88,536.

My invention relates to improvements in temperature regulating devices more particularly adapted for use in combination with internal combustion engines and contemplates in its preferred form the application of means for automatically regulating the temperature of the engine.

In the accompanying drawing I have illustrated a preferred embodiment of my invention, parts being shown in section and parts broken away, illustrating an application of my invention to an automobile engine of the gasolene type.

In the form shown, 2 indicates a pipe comniunicating with the intake manifold of the engine, thereby producing a vacuum in the cylinder 3 while the engine is running. 4 indicates a thermostat of any suitable form mounted in any suitable location and manner. the same being illustrated as within a cylinder 5 which is connected with the pipe 6 in the water circulating system.

7 indicates the usual form of radiator at the front of the automobile. 8 indicates any suitable means for regulating the cooling of the engine, such as a shutter or see tional partition or shield in front of the radiator, the slats of the shutter being suitably pivoted at opposite ends to the sides of the frame as indicated by the reference character 9. 10 is a projection, lug or offset secured to one of the slats 8 as shown, and 14 indicates a vertical slat operating member pivot-ally connected to the slats 8 as indicated at 14. The lug 10 is pivotally connected to a rod 11 which in turn is pivotally connected to a bell crank 12, which is pivotally mounted at 13. From the foregoing it will be seen that when the connecting rod 11 is pushed leftwardly the slats assume the position shown in dotted outline, indicated by the reference character 8, thus completely shutting oif the entire front of the radiator.

The thermostat 4 is provided with a plunger 15 which normally engages the underside of a connecting member 16 having an enlarged or laterally deflected portion adapted to engage and operate the arm 12 of the bell crank 12 when said member 16 is actuated as hereinafter explained. Said member 16 is pivotally mounted on a piston 17 Within the cylinder 3, said piston being normally urged toward the left as viewed in the drawing by a spring 18 between said piston and the end of the cylinder 3.

lVhen the engine is at rest and cool, the thermostat 4 is contracted, thus leaving the member 16 horizontal as shown in dotted outline and projected leftwardly by the spring 18. \Vhen in this position a spring 19, smtably connected to the bar 11 and a fixed point as the rear of the radiator, serves to draw the barll leftwardly thus closing the shutters into the position indicated by the reference character 8, and when water is used as a cooling medium thus preventing undue chilling and freezing of the same. After the engine has been started and is in operation however the vacuum set up in the chamber 3 serves to draw the piston 17 rightwardly against the action of the spring 18, thus bringing the enlarged portion of the member 16 beneath the arm 12 of the bell crank 12 where it may be lifted by the plunger 15 of the thermostat 4- when the same has become sufliciently heated expand the necessary amount, thus pulling the rod 11 rightwardly through the medium of the bell crank 12 and against the action of the spring 19 to thereby open the slats 8 to the position shown in full outline and allow for the necessary circulation of am When the engine stops, the suction in the cylinder 3 is destroyed and spring 18 moves the piston 17 to the left irrespective of the degree of expansion of the thermostat, thus allowing the spring 19 to move the rod 11 and close the shutters to conserve such heat as is in the circulating cooling medium. Thereby the pneumatically operated piston is actuated as an incident to the stopping of the engine for moving the member 16 to such a position that the shutter is closed by spring 19. This spring acts in opposition to the thermostat, but when the enine is running, it is rendered inoperative by the suction-operated piston to prevent opening of the shutter by expansion of the thermostat.

Of course itwill be readily understood that the amount of opening of the slats is governed by the action of the thermostat which in turn, in the application of the invention illustrated, is governed by the temthe slats may be only partly opened or fully opened and that the amount of a1r admitted for maintaining a predetermined, normal or fixed temperature is at all times automatically controlled. It will also be perceived that when the engine is at rest, the shutter 8 is closed irrespective of the degree of expan sion of the thermostat, and therefore the temperature of the engine or its cooling medium, because only when the engine is in operat1on is the piston 17 actuated by suction in the cylinder 3 to position the enlarged portion of the member 16 so that the plunger 15 can operate the bell crank 12. When the engine is in operation the enlarged portion of said member 16 is at once and automatically moved against the tension of spring 18 1nto a position where it ma operate the bell crank 12, against the tension of sprmg 19, upon expansion of the thermostat, but the time and extent of operation of the shutter is controlled entirel by the thermostat, which in turn is contro led by the temperature of the engine as represented by the temperature of the cooling medium in the embodiment illustrated. 7

It will be readily understood that various modifications may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

I claim:

1. In combination with an internal-com bustion engine and its cooling system in-' cluding a radiator, means for controlling the flow of air through said radiator, a thermostat for o crating said means, and means operative on y when the engine is running whereby said controlling means may be operated by said thermostat.

2. In combination with an internal combustion engine and its cooling system including a radiator, means for controlling the cooling capacity of said radiator, thermosensitive means normally disconnected from said controlling means for operating the same, and means efi'ective only when the engine is running for connecting said thermosensitive means and controlling means.

3. In combination with an internal combustion engine and its cooling stem including a radiator, means for contro ling the cool.- ing capacity of said radiator, thermosensitive means normally disconnected from said controlling means for operating the same, and means responsive to suction in the engine for connecting said thermosensitive means and controlling means.

4. In combination with an internal com bustion engine and its cooling system in cluding a radiator, means for controlling the flow of air through said radiator, a thermostat for operating said means, and means responsive to suction in them 'ne wheree operated bustion engine, means for regulating the cooling of said engine, thermosensitive means,

and means operative only when the engine is running for rendering said thermosensitive means capable of operating said regulating means,

6. In combination with an internal oombustion engine, means for regulating the cooling of said engine, thermosensitive means, and means res onsive to suction in the engine for rendering said thermosensitive means capable of operating said regulating means.

7 In combination with an internal combustion engine, means for regulating the cooling of said engine, thermosensitive means, and connections between said thermosensitive means and regulating means including a member movable into and out of a position wherein expansion of said thermosensitive means will operate said regulating means.

8. In combination with an internal combustion engine, means for regulating the cooling of said engine, thermosensitive means, connections'between said thermosensitive means and regulating means including a member movable into and out of position. wherein expansion of said thermosensitive means will operate said regulating means, a'-n d means operative only when the engine is "running for moving said member into operative position.

9. In combination with an internal oombustion engine, means for regulating the cooling of said engine, thermosensitive means, connections. between said thermosensitive means and regulating means including a member movable into and out of a position wherein expansion of said thermosensitive means will operate said regulating means, and means responsive to suction created by the engine for moving said memher into operative position.

10. In combination wth an internal combustion engine and its cooling system including a radiator, means for controlling the passage of air through said radiator, a thermostat, and connections between said thermostat and controlling means including a member movable into and out of position to transmit the motion of said thermostat to said controlling means. 1

11. In comb-'nation with an internal combustion engine and its cooling system including a radiator, means for controlling the passage of air through said radiator, a thermostat, connections between said thermostat and controlling vmeans including amember movable into and out of position to transmit the motion of said thermostat to said conv trollin means, and means forclosing said contro ling means when said connectlons are open.

12. In combination with an internal combustion engine and its cooling system including a radiator, means for controlling the passage of air through said radiator, a thermostat, connections between said thermostat and cont-rolling means including a member movable into and out of position to transmit the motion of said thermostat to said controlling means, and means operative only when the engine is running for moving said member to connection-closing position.

13. In combination with an internal combustion engine and its cooling system includ ing a radiator, means for controlling the passage of air through said radiator, a thermo stat, connections between said thermostat and controlling means including a member movable into and out of position to transmit the motion of said thermostat to said controlling means, means operative only when the engine is running for moving said member to connection-closing position, and means for closing said controlling means whenever the engine stops or said thermostat is contracted.

14. "In combination with an internal combustion engine and its cooling system including a radiator, means for controlling the passage of air through said radiator, a thermostat, connections between said thermostat and controlling means including a member movable into and out of position to transmit the motion of said thermostat to said controlling means, and means operated by the suction of the engine for moving said member to close said connections.

15. In combination with an internal combustion engine and its cooling system including a radiator, means for controlling the passage of air through said radiator, a thermostat, connections between said thermostat.

and controlling means including a member movable into and out of position to transmit the motion of said thermostat to said controllin means,'means operated by the suction oi the engine for moving said member to close said connections, and means for closing said controlling means when the engine stops or said thermostat contracts.

f its 16. In combination with an internal combustion engine, means for regulating the cooling of said engine, a member movable by the existence of suction in the engine, a thermostat, connections for operatin said regulating means, and a member mova 1e by said first named member under the action of suction for transmitting the movement of said thermostat to said connections.

7 17. In combination with an internal combustion engine, means for regulatin the cooling of said engine, a member movable by the operation of said engine, a thermostat,

connections for operating said regulating means, and a member movable b said first named member under the operation of said engine for transmitting the movement of said thermostat to said connections.

18. In combination with an internal combustion engine, means for regulating the temperature thereof, a thermostat, operating connections for said regulating means, and means for rendering said connections directl operable by said thermostat.

19. n combination with an internal combustion engine, means for regulating the temperature thereof, a thermostat, operating connections for said regulating means, and means rendered operative by the operation of the engine for rendering said connections directly operable by said thermostat.

20. In combination with an internal combustion engine, means for regulating the temperature thereof, a thermostat, operating connections for said regulating means, and means actuated by a dilierential pressure existing by reason of the operation of the engine for rendering said connections directly operable by said thermostat.

21. In combination with an internal combustion engine, means for regulating the temperature thereof, a thermostat, operating connections for said regulating means, means operated by the running of said engine for rendering said connections responsive to the expansion of said thermostat, and means for moving said regulating means to a redetermined position when the engine is not running and when the thermostat is contracted.

22. The combination of an internal combustion engine, a cooling system therefor including a radiator, means for controlling the flow of air through the radiator, said means comprising a shutter device associated with the radiator, a thermostat, and means directly responsive to suction produced in the en ine whereby said shutter device is actuateif by said thermostat.

23. The combination of an internal combustion engine, a cooling system therefor including a radiator. means for controlling the flow of air through said radiator, said means comprising a shutter device associated with the radiator, thermosensitive means for actuating said shutter device, and means operated by power derived from the engine for rendering said last named means operative to open said shutter device, said shutter device being adapted to close as soon as the engine stops.

24'. The combination of an internal combustion engine, a cooling system therefor including a radiator, means for varying the cooling capacity of said radiator, a thermostat, connections between said thermostat and said means for varying the cooling capacity of the radiator, and a motor adapted to actuated by difl'erential pressure existing by reason of the operation of the engine for rendering said connections operas tive whereby said first-named means are di-- rectly operated by said thermostat. Y

25. The combination with an internal combustion engine and its cooling system, means for arying the cooling capacity of said i system, connections for operating said means,

. a thermostatioelement, a motive element for varying the cooling capacity of said sys-".

tem, connectionsfor operating said means,

operative only when the engine is in operation, and means operated by one of said elements for connecting the other of said elements with saidlmeans for varying the cooling capacity of the radiator.-., 1 27. In combination with an internalcom bustion engine and its cooling system, means for controlling the cooling capacityof said system, a thermostat, for operating said controlling means, and means for rendering having an opening therein for admitting air said thermostat inoperative to actuate sai controlling means upon the stopping of the engine.

28. In bustion engine and its cooling system, means for controlling the cooling capacity of saidsystem, a thermostat for operating said controlling means, and means :for' breaking the connections between said thermostat and said controlling means upon the stopping of, the engine.

'29. In combination, an internal combustion engine, a casin for said engine having an opening therein or admitting air to cool said engine, an adjustable closure for-said opening, a thermostat adapted to adjust said closure, and pneumatically operated means actuated incident to the stopping of said engine for closing said closure. .30. In combination, an internal combustion engine, a casing or shell for said engine to cool said engine, an adjustable closure for said opening, a thermostatmechanically connected with said closure and adapted to adjust the position thereof, and pneumatically operated means automatically actuated incident to stopping said engine for closing said closure,

31. In combination with an adjustable clobetween the other of 'ing, heat controlled means for said opening, a thermostat for operating said closure, a cylinder, a piston thereir:i

combination with an internal com-' sureadapted to regulate the flow of; through an engine radiator, athermostat connected with said closure and adaptedautomatically to position said closure to cor-' respond with the cooling requirements of the engine when the latter is running, of means adapted when operative to close said closure 1 in opposition to the action of said thermostat, and devices operable by the suction of theengine adapted to render the means lastaforesaid inoperative when the engine is runnin' 4 32. n' combination, an engine, a casing or shell for'{said-enginehaving" an opening therein, an adjustable closure for said open- 7 j] for operating said closure, a cylinder, 9. iston therein, meansloperatively joining sai piston to said closure, and a tube joining said cylinder to. a

manifold of said engine.

.33. In combination. an internal comb ustion engine, a casing forsaid engine having an opening therein, .an adjustable closure means operatively joining said piston to sai closure, and a tube joining said cylinder to I I I the intake manifold of said engin 34. The combination of an internal combustion engine, a cooling system therefor in cluding a radiator, means for controlling the flow of air through sai-d radiator, said means comprising a shutter device associated with the radiator, a thermostat for actuating said shutter device, and means operated by power derived from the engine for rendering said thermostat operative for actuating said shutter device.

35. The combination of an internal com bustion engine, a cooling system therefor. including a radiator, means for controllin the flow of air through the radiator, sai means comprising a shutter device associated with the radiator, a thermostat, and means rendered operative by the engine for render-- ing said thermostat capable of actuating said shutter device. 36. The combination of an internal com bustion engine, a cooling system therefor ineluding a radiator, means for varying the cooling capacity of the radiator, a thermostat, connections from said thermostat to said means for varying the cooling capacity of the radiator, and means operative only when the engine is in operation for renderin said connections operative to operate said first-named means directly by said thermostat.

In testimony whereof I hereunto aflix my signature.

PETER J. SCHWALBENBERG. 

